[Q] Roboto Font on Lockscreen?

Have noticed with the SGS II on 4.0.3 LPB and LPH that when password or pin is selected the text is in roboto but when in slide its sammy's default text how hard/easy is it to change what font the lock screen uses for its clock and such?

yeah ive tried replacing Clockopia and so on even flashing the files in with CMW but it just seems it wont change the Clock Font which is mainly what i want done all text from apps to the keyboard have changed just not the clock on the lock screen so just thought there was another method

yeah basically i have tried everything above including taking the fonts from CM9 and trying to use then and 3 or 4 apps that allow me to change what fonts are used and basically in the end the clock ALWAYS looks like this

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